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Testing the modified Rothamsted Carbon Model for paddy soils against the results from long-term experiments in southern China

文献类型： 外文期刊

作者： Jiang, Guiying 2 ; Shirato, Yasuhito 2 ; Xu, Minggang 1 ; Yagasaki, Yasumi 2 ; Huang, Qinghai 3 ; Li, Zuzhang 4 ; Nie, 1 ;

作者机构： 1.Chinese Acad Agr Sci, Minist Agr, Key Lab Crop Nutr & Fertilizat, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

2.Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan

3.Inst Red Soils Jiangxi Prov, Jinxian 331717, Peoples R China

4.Jiangxi Acad Agr Sci, Inst Soils Fertilizers & Agr Resources, Nanchang 330200, Peoples R China

5.Soil & Fertilizer Inst Hunan Prov, Changsha 410125, Hunan, Peoples R China

6.Southwest Univ, Chongqing 400716, Peoples R China

关键词： long-term experiment;paddy soil;RothC model;soil organic carbon;validation

期刊名称：SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：2.389； 五年影响因子：2.525 ）

ISSN： 0038-0768

年卷期： 2013 年 59 卷 1 期

页码：

收录情况： SCI

摘要： We compared predictions of the modified Rothamsted Carbon Model (RothC) for paddy soils (RothC-26.3_p), with decomposition rate constants set at 0.2 and 0.6 times the values in the original RothC-26.3 for submerged and drained periods, respectively, with the results of five long-term field studies in southern China. These field studies included two paddy-upland rotation sites (Chongqing and Wuchang) and three double rice cropping sites (Wangcheng, Nanchang, and Jinxian). Several treatments (no fertilizer, inorganic fertilizer, and inorganic fertilizer with organic amendments such as straw, green manure, and farmyard manure) were tested at each site. RothC-26.3_p satisfactorily simulated the observed changes in soil organic carbon (SOC) at all paddy-upland rotation sites and in all plots without organic matter application at the double rice cropping sites, but overestimated SOC in plots with organic matter application at double rice cropping sites. We conclude that RothC-26.3_p is suitable for use in China with paddy-upland rotation management and with the regime based on relatively low carbon input at double rice cropping sites. However, for systems with large carbon inputs, RothC needs further modification.

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